Abstract: A black zirconia sintered body is obtained by processing and forming a powder for the black zirconia sintered body, and then sintering the same at a high temperature and normal pressure in the atmosphere. The powder for the black zirconia sintered body is prepared by a hydrothermal synthesis method using a soluble zirconium salt, a soluble yttrium salt and a color former as raw materials, wherein the molar ratio of the soluble zirconium salt, the soluble yttrium salt and the color former is 90-95:1-5:1-9. The black zirconia sintered body can be used in ceramic processes.

Abstract: The present disclosure provides a method and device for acquiring 3D information of an object. The method includes: extracting two-dimensional (2D) key points of the object based on the image, and determining a candidate 3D model set matching the image; determining a plurality of first reference attitudes and positions of each candidate 3D model according to the 3D key points and the 2D key points; acquiring a plurality of reprojection error values between each candidate 3D model and the object at the plurality of first reference attitudes and positions; determining a first target attitude and position and a first target 3D model corresponding to a minimum reprojection error value in the first reprojection error value set; and acquiring the 3D information of the object based on the first target attitude and position and the first target 3D model.

Abstract: Embodiments of the present disclosure provide a method and apparatus for generating information. A method may include: selecting a three-dimensional object model from a preset three-dimensional object model set based on a to-be-matched object image in a target two-dimensional image; determining, based on a normal vector of a ground plane of the target two-dimensional image, a plane equation of ground corresponding to the normal vector of the ground plane in a three-dimensional space; adjusting a rotation parameter and a translation parameter of the three-dimensional object model in the plane characterized by the plane equation; and generating, in response to determining that a contour of the adjusted three-dimensional object model matches a contour of the to-be-matched object image in the target two-dimensional image, three-dimensional information of an object corresponding to the to-be-matched object image based on the adjusted three-dimensional object model.

Abstract: Provided is a light-transmissive zirconia sintered body, obtained by preparing a green body from a powder for the light-transmissive zirconia sintered body by means of isostatic pressing, and sintering the green body at a high temperature and normal pressure after degreasing and biscuit firing. The light-transmissive zirconia sintered body is prepared by dispersing zirconia powder in water, adding an appropriate amount of a dispersant and a binder, mixing the mixture to form a slurry, and spray-granulating same, wherein the molar percentage of yttrium oxide in the zirconia powder is 3-5%. The light-transmissive zirconia sintered body can be used for preparing a fixed dental prosthesis.

Abstract: Provided is a high-light transmittance zirconia sintered body, prepared by processing and forming a material for the high-light transmittance zirconia sintered body, and then performing high-temperature sintering in the atmosphere under normal pressure. The material for a high-light transmittance zirconia sintered body is prepared from zirconia powder and ?-aluminum oxide as raw materials, wherein the molar percentage of yttrium oxide in the zirconia powder is 4-6%. The high-light transmittance zirconia sintered body can be used for preparing a fixed dental prosthesis. The zirconia sintered body has a grain size of 0.1-0.7 ?m, and due to the dispersion and toughening by aluminum oxide, the zirconia sintered body has a higher strength and toughness. Pores in the zirconia powder can be eliminated by adding aluminum oxide. The zirconia sintered body has a higher light transmittance, and the prepared dentures are good in texture, good in jade-like appearance, and closer to the human teeth.

Abstract: A black zirconia sintered body is obtained by processing and forming a powder for the black zirconia sintered body, and then sintering the same at a high temperature and normal pressure in the atmosphere. The powder for the black zirconia sintered body is prepared by a hydrothermal synthesis method using a soluble zirconium salt, a soluble yttrium salt and a color former as raw materials, wherein the molar ratio of the soluble zirconium salt, the soluble yttrium salt and the color former is 90-95:1-5:1-9. The black zirconia sintered body can be used in ceramic processes.